Results of this investigation indicate that most of samples can attenuate peroxide production by inhibiting the deamination of monoamines as a scavenger, regardless of the methods o f processing and provinces of cultivation.

It was also shown to inhibit non-competitively both MAO-A and MAO-B with the IC50 so values. It is concluded that some Chinese green teas may be useful in the prevention/treatment o f neurodegenerative diseases relating to in vitro MAO inhibitory activities. The structure-activity relationship examination should be followed for further research..

There is a co in Japan that produces a concentrated extract of green tea with higher levels of these polyphenols thought to be beneficial.